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Novel AcceleratorNovel Acceleratorandand
Detector SystemsDetector Systems
Roger RuberRoger [email protected]@tsl.uu.se
CAI WorkshopCAI Workshop28 September 200728 September 2007
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2Roger Ruber, CAI Workshop, 28 September 2008
Novel Detector Systems
MEG
WASA
ATLAS
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3Roger Ruber, CAI Workshop, 28 September 2008
To provide high field while minimizing wall material
• Develop high strength conductorNi-doped Aluminium-stabilizer:
– mechanical reinforcement whilekeeping quench stability
• Integrate solenoid in commoncryostat with LAr calorimeter
• Sophisticated design work:– high strength G10 triangular
support structure (sliding)– 3D current & cryogenics feeding– pure Al-strip quench propagator
ATLAS: How to Meet the Requirements?
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Year
(Pure-Al)
ASTROMAG(Al-Si)
SSC/SDC(Al-Zn/Si)
LHC/ATLAS(Al-Ni)
BESS-Polar(Al-Ni)
Ordinal Copper
courtesy A. Yamamoto
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4Roger Ruber, CAI Workshop, 28 September 2008
Novel Accelerator Systems
• Circular vs. Linear Collider– circular accelerator → synchrotron loss– higher acc. gradient → shorter linac
• Power Production– klystron → maintenance cost– two-beam acceleration
• Accelerating Gradient– superconducting → limit ~50 MV/m (Bc)– normal conducting → RF break down
• CTF3 international test facility– power production & high gradient
cost
energy
CircularCollider
LinearCollider
drive beam
main beam
RF power
pulsed RFpowersource
d
RF load
Electric fieldRF wall currents
courtesy H. Braun
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5Roger Ruber, CAI Workshop, 28 September 2008
• reliability issue– operation stability– beam stability (kick)
• structure damage– conditioning to reach nominal– damage in high field areas
• physics phenomena to be investigated– electron & ion currents, radiation (visible, UV, X-ray)– microscopy & DC break down
RF Break Down
©© CERNCERN30 GHz30 GHz
©© CERNCERN
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6Roger Ruber, CAI Workshop, 28 September 2008
Summary
• Broad physics & engineering experience
• Project management & collaborationwith CERN, KEK & industry
• Looking for collaborators in– particle & accelerator physics– material science &
surface physics– electromagnetism– electronics– software & control– design, construction & engineering– …